I have had my decks setup in my friends Dad's studio for a few months now, and yesterday when mixing the right side speaker started making a rattle sound. It did not sound like the speaker had blown as there was no pop or bang sound when it happened, and you can not really hear it at a low volume. The levels were not too high either, I would really appreciate some advice as I am panicking big time as the speakers are built into the soundproofing and are quite large, and know his Dad isnt going to be very happy if something is damaged. Im yet to test the speaker since Friday to see if it was a one off occurrence. If anyone has had similar experiences or knows what could be the issue please help!